/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.pinterest.secor.io;

import com.pinterest.secor.message.MessageHeader;

import java.util.List;

/**
 * Generic Object used to read next message from various file reader
 * implementations
 *
 * @author Praveen Murugesan (praveen@uber.com)
 *
 */
public class KeyValue {

	private final long mOffset;
	private final byte[] mKafkaKey;
	private final byte[] mValue;
	private final long mTimestamp;
	private List<MessageHeader> mHeaders;

	// constructor
	public KeyValue(long offset, byte[] value) {
		this.mOffset = offset;
		this.mKafkaKey = new byte[0];
		this.mValue = value;
		this.mTimestamp = -1;
	}

	// constructor
	public KeyValue(long offset, byte[] kafkaKey, byte[] value) {
		this.mOffset = offset;
		this.mKafkaKey = kafkaKey;
		this.mValue = value;
		this.mTimestamp = -1;
	}

	// constructor
	public KeyValue(long offset, byte[] kafkaKey, byte[] value, long timestamp) {
		this.mOffset = offset;
		this.mKafkaKey = kafkaKey;
		this.mValue = value;
		this.mTimestamp = timestamp;
	}

	// constructor
	public KeyValue(long offset, byte[] kafkaKey, byte[] value, long timestamp, List<MessageHeader> headers) {
		this.mOffset = offset;
		this.mKafkaKey = kafkaKey;
		this.mValue = value;
		this.mTimestamp = timestamp;
		this.mHeaders = headers;
	}

	public long getOffset() {
		return this.mOffset;
	}

	public byte[] getKafkaKey() {
		return this.mKafkaKey;
	}

	public byte[] getValue() {
		return this.mValue;
	}

	public long getTimestamp() {
		return this.mTimestamp;
	}

	public boolean hasKafkaKey() {
		return this.mKafkaKey != null && this.mKafkaKey.length != 0;
	}

	public boolean hasTimestamp(){
		return this.mTimestamp != -1;
	}

	public List<MessageHeader> getHeaders() {
		return mHeaders;
	}
}
